The vehicle bodies were subjected to dynamic loads arising from complex road conditions during actual operations, current research on SPR primarily focused on static load response analysis, with insufficient attention given to dynamic load response analysis. A dynamic modelling and analysis method for SPR joints was proposed based on a mass-spring system herein. ABAQUS finite element analysis was employed to identify the tensile and shear stiffness parameters of the SPR joints. The connection between the SPR joints and the sheet metal was abstracted as an interaction between mass-spring systems, establishing a three-degree-of-freedom nonlinear dynamic response model for SPR. Finite element simulation was used to validate the SPR dynamic response equivalent model. Research indicates that the SPR three-degree-of-freedom nonlinear dynamic response model enables efficient and accurate prediction of SPR joints dynamic responses.
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